Chimney-top draft-regulator



No. 6l2,547. Patented Oct. l8, I898.

- B. B. LEWIS.

, CHIMNEY TOP DRAFT REGULATOR.

(Application filed Nov. 19, 1896.)

(No Model.)

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ATENT CHIMNEY-TOP DRAFT-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 612,547, dated October 18, 1898.

Application filed November 19, 1896. Serial No. 612,754. (No model.)

T0 (LZZ whom it may concern.-

Be it known that I, BENJAMIN l3. LEWIS, a citizen of the United States, and a resident of Bridgeport, county of Fairlield, and State of Connecticut, have invented a new and useful Improvement in Chimney-Top Draft-Regulators, of which the following is a specification.

My invention relates to an improvement inchimney-top draft-regulators and relates more especially to that class in which the chimney-top terminates in a cap or cover, under which on the several sides of the chimney openings are leftin the brickwork for the fine or flues of the chimney. A trouble often experienced in connection with such covered chimney-tops has been that when a strong wind was blowing directly against a flue-opening an atmospheric pressure was created in the chimney-top setting in motion a downward flow of cold air or back draft, as it is sometimes called, within the chimney.

My invention consists in an external shield to flue-openings of this kind, approximately of the size of the flue-opening and placed at such a distance from the face of the chimney as to leave suitable openings between it and the chimney for the passage of smoke and heated air from the same, held in position by means of a retaining-bar on the opposite side or interior of the wall of the chimney, passing transversely across the flue-opening, and having either end bearing against the interior side of the chimney-wall, and having an adj ustable connection with the exterior. shield by means of a rod or bar passing through the flue-openings and attached at either end to these separate parts of the mechanism employed. This connecting-barmay either form a part of the exterior shield or of the interior retaining-bar, or a separate rod may be employed having suitable connections at its extremities with the exterior shield and the interior retaining-bar. The adjustable attachment between the retaining-bar and the shield I ordinarily obtain by means of a screw thread and nut upon one end of the connect ing-bar, and by the tightening of which nut these two parts may be drawn into a closer relative position. i

I preferably employ a retaining-bar having a lug or shoulder at either end projecting into the flue-opening, so as to guard against any possibility of shifting from side to side. I

also preferably make use of a similar lug or shoulder attached to the inner portion of the exterior shield and projecting for a similar purpose into the flue-opening.

It is evident that both in the case of the retaining-bar and also' in the framework of the shield itself no essential difference in the apparatus or in the result obtained will occur, whether the bar be bent at either end, so as to form a shoulder bearing against the inte rior of the flue-opening, or a straight bar be employed having a lug projecting within the flue-opening.

In the drawings, Figure 1 is a side elevation of a flue-opening shield and chimney-top holding the same. Fig. 2 is a plan view of a chimney-top with the cap removed, showing the flue-openings, in one of which my apparatus is shown in position.

In the drawings,Fig. 1, a flue-openin g shield G is shown, having a side bar 0 with lug E at one end, and also the end of a crossbar M, which connectsthe side bars of the shield and through which passes the connecting-bar B, forming a part of the retaining-barA and having at its extremity a screw-thread and nut, by means of which the distance between these two parts may be properly adjusted.

At the end of the retaining-bar A is shown the lug D, also projecting into the flue-opening N. p

In the drawings, Fig. 2,the shield Gis shown in position outside the flue-opening N, its side bars C 0 having ends bearing against the exterior face of the chimney-wall and having attached lugs E E projecting into the flue-opening. A cross-bar M is shown connecting the side bars C 0. Through it passes the end of the projecting part B of the retaining-bar A, which by means of the screwthread and the nut bearing against the inner side of the bar M of the shield holds the latter in a fixed and stable position within the flue-opening.

shown having the end lugs D D projecting from its interior side into the flue-opening.

Similar parts in either figure of the drawings are designated by similar letters.

What I claim is 1. In a chimney-top the combination of a solid terminal cap or cover with an exterior The retaining-bar A is also IOO lugs, D, D, projecting into the flue-opening,

and having also an adjustable connection With the shield, G, substantially as shown.

4. In a chimney-top, havinga stone cap,

the combination of an exterior flue-opening shield, G, having lugs, E, E, projecting into the flue-opening, and a retaining-bar, A, having lugs D, D, also projecting into the flueopening, and having also an adjustable con neotion with the shield G, substantially as shown.

' In testimony that I claim the foregoing as my invention I have signed my name, in presence of two Witnesses, this 17th day of November, 1896.

BENJAlllIN B. LEVIS.

Witnesses:

ALFRED B. FAIROHILD, WILLIAM B. MCCLELLAN. 

